Class: Gitlab::Database::Partitioning::List::LockingConfiguration

Inherits:
Object
  • Object
show all
Defined in:
lib/gitlab/database/partitioning/list/locking_configuration.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(migration_context, table_locking_order:) ⇒ LockingConfiguration

Returns a new instance of LockingConfiguration.



10
11
12
13
14
 
# File 'lib/gitlab/database/partitioning/list/locking_configuration.rb', line 10

def initialize(migration_context, table_locking_order:)
  @migration_context = migration_context
  @table_locking_order = table_locking_order.map(&:to_s)
  assert_table_names_unqualified!(@table_locking_order)
end

Instance Attribute Details

#migration_context ⇒ Object (readonly)

Returns the value of attribute migration_context.



8
9
10
 
# File 'lib/gitlab/database/partitioning/list/locking_configuration.rb', line 8

def migration_context
  @migration_context
end

Instance Method Details

#lock_timing_configuration ⇒ Object 



37
38
39
40
41
42
 
# File 'lib/gitlab/database/partitioning/list/locking_configuration.rb', line 37

def lock_timing_configuration
  iterations = Gitlab::Database::WithLockRetries::DEFAULT_TIMING_CONFIGURATION
  aggressive_iterations = Array.new(5) { [10.seconds, 1.minute] }

  iterations + aggressive_iterations
end

#locking_order_for(tables) ⇒ Object

Sorts and subsets ‘tables` to the tables that were explicitly requested for locking in the order that that locking was requested.



30
31
32
33
34
35
 
# File 'lib/gitlab/database/partitioning/list/locking_configuration.rb', line 30

def locking_order_for(tables)
  tables = Array.wrap(tables)
  assert_table_names_unqualified!(tables)

  @table_locking_order.intersection(tables.map(&:to_s))
end

#locking_statement_for(tables) ⇒ Object 



16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/gitlab/database/partitioning/list/locking_configuration.rb', line 16

def locking_statement_for(tables)
  tables_to_lock = locking_order_for(tables)

  return if tables_to_lock.empty?

  table_names = tables_to_lock.map { |name| migration_context.quote_table_name(name) }.join(', ')

  <<~SQL
    LOCK #{table_names} IN ACCESS EXCLUSIVE MODE
  SQL
end

#with_lock_retries(&block) ⇒ Object 



44
45
46
47
48
49
50
51
 
# File 'lib/gitlab/database/partitioning/list/locking_configuration.rb', line 44

def with_lock_retries(&block)
  lock_args = {
    raise_on_exhaustion: true,
    timing_configuration: lock_timing_configuration
  }

  migration_context.with_lock_retries(**lock_args, &block)
end